... on needs the sound-insulated plate,has compared to the ordinary board a better is sound-insulated effect,bears the ... 20 years quality guarantee. Product SizeThe PC transparent soundproofing board LT20-1TMThickness2,3,4.5,6.0mmWidth1220,1560,1820, ... 2050mmLength3050mmResist WeatherGeneral,indoor useProduct SizeThe PC transparent soundproofing board LT20-2TMThickness2,3,4.5,6.0mmWidth1220,1560,1820 ...